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Coupling of the Na+/K+-ATPase to Ankyrin B controls Na+/Ca2+ exchanger activity in cardiomyocytes.

Cardiovasc. Res.. 2019; 
SkogestadJ,AronsenJ M,TovsrudN,WanichawanP,HougenK,StokkeM K,CarlsonC R,SjaastadI,SejerstedO M,Sw
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摘要

Ankyrin B (AnkB) is an adaptor protein that assembles Na+/K+-ATPase (NKA) and Na+/Ca2+ exchanger (NCX) in the AnkB macromolecular complex. Loss-of-function mutations in AnkB cause the AnkB syndrome in humans, characterized by ventricular arrhythmias and sudden cardiac death. It is unclear to what extent NKA binding to AnkB allows regulation of local Na+ and Ca2+ domains and hence NCX activity.

关键词

Ankyrin B,Ca2+ waves,NCX,NKA,excitation-contraction coup